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Project-75I : Agreement

Project-75I : Agreement

Spanish submarine manufacturer Navantia and India’s Larsen and Toubro (L&T) recently concluded a Teaming Agreement, to jointly bid for theProject-75I.

  • Under this, the Indian Navy will procure six advanced conventional submarines processed through the Strategic Partnership (SP) model.
  • These will be diesel-electric submarines, having advanced Air-independent propulsion (AIP) systems.
  • Project 75I requires an Indian bidder to tie up with a foreign collaborator and build six conventional submarines equipped with AIP systems.
  • The first submarine must have a minimum of 45% indigenisation, with the indigenous content going up to 60% in the sixth.

Air-independent propulsion (AIP) System:

  • With the emergence of submarines, there was a problem finding satisfactory forms of propulsion underwater.
  • AIP is mostly implemented as an auxiliary source, with the traditional diesel engine handling surface propulsion.
  • Most of these systems generate electricity, which in turn drives an electric motor for propulsion or recharges the boat’s batteries.
  • A typical conventional power plant provides 3 megawatts maximum, and an AIP source around 10 percent of that. A nuclear submarine’s propulsion plant is much greater than 20 megawatts.